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Thread: Will a 366 flywheel work on a 454?
          
   
   

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  1. 05-29-2012 06:02 PM #1
    crossram409
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    Will a 366 flywheel work on a 454?

     



    I have a tired 366 Chevy big block in one of my trucks. I have a fresh rebuilt 454 out of a motor home. I have heard that a 366 and 454 flywheel have the same weights on the flywheel and are inter changeable but no one I talk to is sure 100%. Lots of experience with 427's and 454's but not a lot with a 366. Trying to get out of buying a new flywheel.
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  3. 05-29-2012 06:56 PM #2
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    pat mccarthy
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    No they are Not who ever told you that is way Wrong ..... the 454 is external all other BBC366.396.402.427. are internal. a 366 is a 10.200 tall deck block 427 with a very small bore and both are internal balanced
    Last edited by pat mccarthy; 05-29-2012 at 06:59 PM.
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  4. 05-30-2012 07:15 AM #3
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    NAPA shows the 454 flexplate, jobber @ $49.87 and the flywheel @ $154.02.
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  5. 05-30-2012 09:24 AM #4
    crossram409
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    Even better because I have a rebuilt 427 tall deck truck engine. Because of the false info given to me that the 366 was externally balanced with the same flywheel as the 454 I thought I couldn't use it with the flywheel that is in the truck. Thanks a lot for the correct information.
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  6. 05-30-2012 09:39 AM #5
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    NTFDAY
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    The only other Chevy engine, that I'm aware of, that is externally balanced is the small block 400.
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  7. 05-30-2012 01:04 PM #6
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    the 350 sb with one piece rear seal are external rear and internal front
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  8. 05-30-2012 02:29 PM #7
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    yes ....But .....i was taking BBC and that what he was asking about not small blocks yes i know a ll bout the 1/2 and 1/2 small and 400s blocks no sence getting the guy befuddled
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  9. 05-30-2012 02:31 PM #8
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    Quote Originally Posted by NTFDAY View Post
    The only other Chevy engine, that I'm aware of, that is externally balanced is the small block 400.
    502 are to
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